fix memory leak

src/Game.cpp

@@ -1,10 +1,10 @@
 #include <QPainter>
 #include "Game.h"
 
-void Game::draw(QPixmap *output) {
-	QPainter p(output);
-	double w = output->size().width();
-	double h = output->size().height();
+void Game::draw(QPixmap &output) {
+	QPainter p(&output);
+	double w = output.size().width();
+	double h = output.size().height();
 	p.fillRect(w / 2 - 10, h / 2 - 10, 20, 20, Qt::red);
 	p.drawEllipse(0, 0, 20, 20);
 }

src/Game.h

@@ -6,5 +6,5 @@ class Game {
 	GameQueue * eventQueue = new GameQueue;
 
 public:
-	void draw(QPixmap * output);
+	void draw(QPixmap & output);
 };

src/Window.cpp

@@ -12,10 +12,10 @@ Window::Window() {
 }
 
 void Window::paintEvent(QPaintEvent *event) {
-	auto output = new QPixmap(label->size());
-	output->fill(Qt::white);
+	QPixmap output(label->size());
+	output.fill(Qt::white);
 	game.draw(output);
-	label->setPixmap(*output);
+	label->setPixmap(output);
 }
 
 void Window::resizeEvent(QResizeEvent *e) {